/*
 * Copyright (c) 2014 pkzd/1.0, 颜文泽(robin)
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     1 Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     2 Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef MC_PAGE_H
#define MC_PAGE_H

#include        <types.h>
#include	<param.h>

#define PAGE_LIST_NUM    255
#define PAGE_LIST_SWP	0x80000000
#define PAGE_LIST_ADDR(x)    ((x & PG_SWP) ? ((x & PG_ADDR_MASK) >> PG_PTE_SHIFT) | PAGE_LIST_SWP : x & PG_ADDR_MASK)

struct page_list{
	uint    p_cnt; 
        uint    p_addr;
        struct page_list *p_next;
        struct page_list *p_head;    
};

extern uint page_list_lock;
extern struct page_list *pfreelist;
extern struct page_list *pusedlist;

int	page_list_add(void);
void	page_list_init(void);
void	page_list_rm(struct page_list *p);
struct page_list *page_list_free(uint addr);
struct page_list *page_list_get(uint addr);
struct page_list *page_list_alloc(uint addr);

#endif
